package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOPeration{

    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书！！！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除图书的书名：");
        String name = scanner.nextLine();

        int index = -1;
        int currentSize = bookList.getUsedSize();
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(name)){
                index = i;
                break;
            }
        }
        if (i >= currentSize){
            System.out.println("没有你要删除的图书！");
            return;
        }
        //移动数据进行覆盖
        for (int j = index; j < currentSize - 1; j++) {
            Book book = bookList.getBook(j + 1);
            bookList.setBook(book,j);
        }
        bookList.setBook(null,currentSize - 1);
        bookList.setUsedSize(currentSize - 1);
        System.out.println("删除成功！！！");
    }
}
